/*
 * Copyright 2009 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.gtugs.web;

import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.gtugs.domain.Chapter;
import org.gtugs.domain.Event;
import org.gtugs.service.ChapterManager;
import org.gtugs.service.EventManager;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

/**
 * @author jasonacooper@google.com (Jason Cooper)
 */

@Controller
public class ChapterController{

  @Autowired
  private ChapterManager chapterManager;
  @Autowired
  private EventManager eventManager;

  @RequestMapping("/chapter")
  public ModelAndView getChapter(@RequestParam("id")String id) throws ServletException, IOException {
    
    Chapter chapter = retrieveChapter(id);

    if (chapter == null) {
      String errorText = "Failed to retrieve chapter with ID \"" + id + 
          "\" -- chapter not found.";

      return new ModelAndView("error", "errorText", errorText);
    }

    chapter.setNumEvents(0);

    List<Event> pastEvents = eventManager.getPastEvents(chapter.getId());
    if (pastEvents != null) {
      chapter.setNumEvents(pastEvents.size());

      int totalAttendees = 0;
      int totalEvents = 0;
      for (Event event : pastEvents) {
        if (event.getAttendeeCount() != null) {
          totalAttendees += event.getAttendeeCount();
          totalEvents++;
        }
      }

      if (totalEvents > 0) {
        chapter.setAverageAttendees(totalAttendees/totalEvents);
      }
    }

    Map<String, Object> model = new HashMap<String, Object>();
    model.put("chapter", chapter);
    model.put("events", eventManager.getEventsForChapter(chapter.getId(), true));
    model.put("pastevents", pastEvents);

    return new ModelAndView("chapter", "model", model);
  }
  
  @RequestMapping("/chapters")
  public ModelAndView getChapterList() throws ServletException {
	    List<Chapter> chapters = chapterManager.getActiveChapters();
	    JSONArray list = null;

	    if (chapters != null) {
	      list = new JSONArray();
	      for (Chapter chapter : chapters) {
	        JSONObject map = new JSONObject();
	        map.put("id", chapter.getId());
	        map.put("name", chapter.getName());
	        map.put("latitude", chapter.getLatitude());
	        map.put("longitude", chapter.getLongitude());
	        map.put("url", "http://www.gtugs.org/chapter.jsp?id=" +
	            chapter.getId());
	        map.put("website", chapter.getWebsite());
	        map.put("status", chapter.getStatus());
	        list.add(map);
	      }
	    }

	    return new ModelAndView(new JsonView(), "chapters", list);
	  }
  private Chapter retrieveChapter(String idString) {
    Long id = null;

    try {
      id = Long.parseLong(idString);
    } catch (NumberFormatException ex) {
      return null;
    }

    return retrieveChapter(id);
  }

  private Chapter retrieveChapter(Long id) {
    return chapterManager.getChapter(id);
  }
}
